diff --git a/grpc.gemspec b/grpc.gemspec
index a9d3daf30d939..b6aae7f8fb2eb 100644
--- a/grpc.gemspec
+++ b/grpc.gemspec
@@ -3032,7 +3032,6 @@ Gem::Specification.new do |s|
   s.files += %w( third_party/cares/cares/include/ares_nameser.h )
   s.files += %w( third_party/cares/cares/include/ares_rules.h )
   s.files += %w( third_party/cares/cares/include/ares_version.h )
-  s.files += %w( third_party/cares/cares/src/config-dos.h )
   s.files += %w( third_party/cares/cares/src/config-win32.h )
   s.files += %w( third_party/cares/cares/src/lib/ares__addrinfo2hostent.c )
   s.files += %w( third_party/cares/cares/src/lib/ares__addrinfo_localhost.c )
@@ -3107,6 +3106,7 @@ Gem::Specification.new do |s|
   s.files += %w( third_party/cares/cares/src/lib/ares_writev.h )
   s.files += %w( third_party/cares/cares/src/lib/bitncmp.c )
   s.files += %w( third_party/cares/cares/src/lib/bitncmp.h )
+  s.files += %w( third_party/cares/cares/src/lib/config-dos.h )
   s.files += %w( third_party/cares/cares/src/lib/inet_net_pton.c )
   s.files += %w( third_party/cares/cares/src/lib/inet_ntop.c )
   s.files += %w( third_party/cares/cares/src/lib/setup_once.h )
diff --git a/src/c-ares/gen_build_yaml.py b/src/c-ares/gen_build_yaml.py
index a41a8fcc2a03e..479da2c93c00a 100755
--- a/src/c-ares/gen_build_yaml.py
+++ b/src/c-ares/gen_build_yaml.py
@@ -132,7 +132,7 @@ def ares_build(x):
                 "third_party/cares/cares/src/lib/ares_llist.h",
                 "third_party/cares/cares/src/lib/ares_platform.h",
                 "third_party/cares/cares/src/lib/ares_ipv6.h",
-                "third_party/cares/cares/src/config-dos.h",
+                "third_party/cares/cares/src/lib/config-dos.h",
                 "third_party/cares/cares/src/lib/bitncmp.h",
                 "third_party/cares/cares/src/lib/ares_strcasecmp.h",
                 "third_party/cares/cares/src/lib/setup_once.h",
diff --git a/third_party/cares/cares.BUILD b/third_party/cares/cares.BUILD
index 709521ed8f01f..44ac6cb8d95b3 100644
--- a/third_party/cares/cares.BUILD
+++ b/third_party/cares/cares.BUILD
@@ -209,7 +209,7 @@ cc_library(
         "src/lib/ares_llist.h",
         "src/lib/ares_platform.h",
         "src/lib/ares_ipv6.h",
-        "src/config-dos.h",
+        "src/lib/config-dos.h",
         "src/lib/bitncmp.h",
         "src/lib/ares_strcasecmp.h",
         "src/lib/setup_once.h",